Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. For obtaining high COP, the pressure range of compressor should be

2. A bootstrap air cooling system has

3. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

4. Which of the following is not a desirable property of a refrigerant?

5. Rating of a domestic refrigerator is of the order of

6. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate following h.p. per ton of refrigeration

7. The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

8. Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

9. The value of C.O.P in vapour compression cycle is usually

10. In a lithium bromide absorption refrigeration system


 

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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